Hoisting device



(No Model.)

0. G. STEWART.

HOISTING DEVIGE. No. 351,293. Patented Oct. 19, 1 886.

o-Lllhognpher, Wuhinglnn, n c

NITED STATES PATENT Fr ed HOlSTlNG DEVICE.

SPECIFICATION forming part of Letters Application filed June 17, 1886.

To aZZ whom it may concern.-

Be it known that l, (Jr-mamas O. STEWART, a citizen of the United: States, residing at Oneonta, in the county of Otsego and State of New York, have invented certain new and useful Improvements in Hoisting Devices, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 represents a sectional view of my device applied to the running-gear of a vehicle. Fig. 2 is a side elevation of my improvement with a portion of the frame broken away to show the mechanism for operating :ghe brake. Fig. 3 is a detail of the ratchet- My invention relates to devices attached to the rear axle of a wheeled vehicle, and adapted to be used in removing heavy substances-such as rocks, logs, &c.--froni a field, and for such other purposes as would necessitate the employment of a powerful lifting apparatus; and my invention consists in the construction and combination of devices hereinafter described, and specifically pointed out in the claims.

To enable others skilled in the art to which my invention appertains, I will now describe the manner in which I have carried it out.

In the said drawings, A represents the two sides of a suitable frame or casting, which is designed to be bolted or otherwise secured to the rear axle of a vehicle, and this casting is provided with grooves a, in which is vertically guided a rack-bar, B, the purpose and construction of which will be hereinafter developed.

An operating-lever, O, pivoted between the sides A of the main casting, has its inner end or short arm, 0, bifurcated to receive a pivotally-mounted movable pawl, D, which engages the teeth on the rack-bar and elevates the latter. 7

Immediately above the pawl D, and mount ed between the sides of themain frame or casting, is a second pawl, E, which I prefer to designate a stationary pawl, in that it holds the rack-bar in its adjusted position until changed by the future movements of the operating-lever and movable pawl D. The pawls D and E are provided with eyes I) c, in which one end of suitable connecting-rods, (Z and e, is

Patent No. 351,293, dated October 19,1886.

Serial No. 105,480. (No model.)

secured, the outer ends of said rods being attached to eyes f and 9, formed in bent levers F F, the short arms of which are pivotally secured to the opposite sides of the main or operating lever 0, whereby the weight of the levers holds the pawls to their engagement with the rack.

From this arrangement of the several parts it is manifest the operator, by drawing upon the lovers F or F, withdraws either or both the pawls D and E from their engagement with the teeth on the rack-bai', and permits said bar to drop or be lowered, as hereinafter set forth.

As before described, the rack-bar B has a vertical movement between the sides of the main casting, it being provided with tongues h,which fit within the grooves a. Upon the ity or groove G, and between the sides A is journaled a dog, H, provided with a grooved face, Z, and projections m and n. Against the face of the latter a spring, 12, secured to the rack-bar B, is designed to bear to throw the upper end of the dog H inward.

A loosely placed roller, L, is introduced between the sides of the main frame, and when the rack-bar is being adjusted is designed to lie within the grooved face of the dog H; but when the rack-bar has been adjusted, by the repeated movements of the operating-lever, to bring the cavity or groove G into alignment with the grooved face of the dog H, the loose roller immediately falls into said cavity, and is retained therein by the action of the spring 1), and keeps the rack-bar in a locked position until the roller is withdrawn from the said cavity or groove. To accomplish this latter result, I pivot upon the lower end of the short arm 0 of the lever O a downwardly-proiecting dog, M, adapted to come in contact with the lug m on the dog H,when the operating-lever is depressed, and force the upper end of the dog H away from the rack-bar, thereby en abling the loose roller to fall from its seat in the cavity in said rack-bar into the grooved face of the dog H, and permitting the rackbar to be lowered by withdrawing the pawls The operating-lever B is provided upon its sides with eccentrics M, over which are placed one end of the arms N, the opposite end of lower portion of the rack'bar is formed a eav- ICO D and E in the manner previously described.

said arms being threaded, as shown at r, Fig. 2. These threaded ends pass through the rear of main frame A, and through a suitable brakeblock, 0, to which they are secured. by suitable nuts and washers. A spring passesthrough the brake-block, and with its ends bearing against the back of the rack-bar. It is evident from this description that the movements of the operating-lever cause the eccentrics to actuate the arms N, either to draw them against the back of the rack-bar or force them away from the same, thereby constituting a brake which assists in holding the rack-bar in its adjusted position. The rack-bar is provided with a lug, s, which is designed as a stop to prevent the said bar dropping entirely out of the main frame, and theframe has projections 25, which support the brake-bar.

Upon the lower end of the rack-bar is cast or otherwise secured a plate, P, having a series of oblong perforations, U, which are designed to receive and support the upper ends of suitable grappling-hooks, R, whose lower ends are adapted to engage and hold the article to be removed. The outer ends of the plate P terminate in hooks I over which suitable chains are passed when the device is employed for transporting heavy timbers, in which event the hooks are dispensed with, the chains being passed around the timber in any secure manner. It is now manifest if the grappling hooks and chains, when necessary, are made to engage the rock, log, or other object to be removed, and power applied to the operatinglever, the rack-bar, and with it the article held by the hooks, will be elevated above the ground a distance sufficient to enable the operator to drive to a remote part of the field, or any other appropriate place, and deposit said article by withdrawing the pawls O and D and forcing the dog H from the rack-bar.

' Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

with a frame, a rack-bar, and operating-lever,

of a brake-bar, suitable eccentrics on the operating-lever, and the arms N, engaging the eccentrics, whereby the brake-bar is operated, substantially as herein described- 3. In a hoisting device, the combination, with a frame, a rack-bar sliding therein, and

a lever having eccentrics upon its sides, of the arms N, engaging the eccentrics and provided with threaded ends, abrake-bar through which the threaded ends pass, securing-nuts for the arms, and a spring, the ends of which bear against the back of the rack-bar, substantially as herein described.

4. In a hoisting device, a frame, a rack-bar sliding therein, and an operating -lever, in combination with a dog, H, pivoted between the sides of the frame, a roller loosely supported in the end of said dog, and a second dog, M, pivoted in the short arm of the lever and adapted to engage a projection on the dog H, substantially as herein described.

5. In a hoisting device, a frame, a rack-bar sliding therein and provided with a groove or cavity, in combination with a dog, M, pivoted to the short arm of the lever, a dog, H, pivoted between the sides of the frame, a looselymount'ed roller seated in the face of the dog H and adapted to enter the groove or cavity in the bar, and a spring bearing against the lower end of the dog H, substantially as herein described.

\ CHARLES o. STEWART.

'Witnessesr THOMAS MOCULLY, Monnis M. ELWELL. 

